I fought Karolak Kightspinner three times and each time she never appeared for me to talk to her. Now I am stuck and cannot move on with the main quest line. Any help?Scaret ShadowStone level 66

You didn't mention which quest you have. Is it "Inevitable Betrayal"? If it is, after you defeat Karolak, the next step is to talk to Leland Hawkins. Do you have an open quest in your quest log file that says "talk to Leland Hawkins"?